If you really want the Mirriah fans, you could try asking some of the vendors that do a lot of work on cars, such as Kirk Evans or others, you will probably find they have them laying around as other owners have removed them to fit the sucker fans.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.